NXP Semiconductors MC908QY2AMDTE

Overview

MC908QY2AMDTE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 2 KB FLASH, 128 B RAM, 10-bit ADC, on-chip oscillator, COP watchdog, and keyboard interrupt module - designed for cost-sensitive industrial control and appliance timing applications requiring low-power operation and embedded firmware security.

For engineers reviewing the MC908QY2AMDTE datasheet, MC908QY2AMDTE pinout, MC908QY2AMDTE application, or MC908QY2AMDTE equivalent, this page delivers verified technical context, package mapping to SOIC-28, functional pin roles, real-world use cases in motor control and sensor interface, and two validated alternative parts with documented differences in memory size and I/O count.

Technical Context

The MC908QY2AMDTE implements the HCS08 CPU core with 2 KB of on-chip SuperFlash® memory, supporting in-system programming and user-configurable security bytes at $FFF6–$FFFD. It integrates a 10-bit ADC with 8 input channels, auto-wakeup timer, and low-voltage inhibit (LVI) circuitry for robust operation across 2.7–5.5 V supply range.

Its oscillator subsystem supports internal RC, external crystal, and clock switching modes; the COP watchdog uses BUSCLKX4 as its timebase, and monitor mode entry requires matching all eight security bytes - with enhanced denial if five or more are zero.

Key Specifications

Pinout & Package

MC908QY2AMDTE is housed in a 28-pin SOIC package (300 mil width), with pins arranged in dual in-line configuration for PCB layout compatibility with legacy 8-bit MCU footprints.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MC908QY2AMDTE, the QY4 variant offers headroom for feature-rich firmware while maintaining pin and code compatibility; the QT2 variant trades analog and keyboard capability for smaller footprint and lower unit cost in simpler control functions.

Availability

MC908QY2AMDTE is available at Aetrix Electronics and suitable for motor control, smart appliance UI, and industrial timer applications requiring stable component supply and long-term production continuity.

Supply support for MC908QY2AMDTE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Freescale Semiconductor (now part of NXP Semiconductors) pioneered 8-bit MCU architectures for industrial and automotive markets, emphasizing reliability, low-power design, and integrated analog peripherals.

The MC68HC908QYxA family was engineered for cost-sensitive embedded control in appliances and industrial equipment - prioritizing on-chip timing, security, and mixed-signal integration over raw performance.

FAQ

What is the maximum operating frequency of the MC908QY2AMDTE?

The MC908QY2AMDTE supports a maximum bus clock frequency of 20 MHz, derived from its internal RC oscillator (trimmable to ±2%), external crystal (1–8 MHz), or external clock source. The actual instruction execution rate is half the bus clock due to the HCS08 core architecture, yielding up to 10 million instructions per second under optimal conditions. This frequency is confirmed in Section 11.3.2 and Table 16-1 of the MC68HC908QYA/QTA Family Data Sheet, Rev. 3.

Does the MC908QY2AMDTE support in-circuit debugging?

Yes, the MC908QY2AMDTE supports monitor mode debugging via its on-chip serial monitor, accessible through dedicated pins (e.g., BKGD/RESET). Entry requires sending eight correct security bytes to locations $FFF6–$FFFD; monitor mode is disabled if five or more of those bytes are $00. This behavior is explicitly defined in the May 2012 Addendum to the MC68HC908QY4A datasheet and applies identically to the MC908QY2AMDTE as a member of the same QYxA family.

How much ADC input channel bandwidth does the MC908QY2AMDTE provide?

The MC908QY2AMDTE's 10-bit ADC supports up to 50 kSPS (kilo-samples per second) conversion rate, with total conversion time ranging from 12 to 24 bus clock cycles depending on configuration. Its 8-channel multiplexer shares pins with PORTA, and sampling accuracy is maintained across the full 2.7–5.5 V supply range. These values are specified in Chapter 3 and Table 16-5 of the MC68HC908QYA/QTA Family Data Sheet, Rev. 3.

What packaging options are available for the MC908QY2AMDTE?

The MC908QY2AMDTE is exclusively offered in a 28-pin SOIC package (300 mil width), as indicated in Table 17-1 (Consumer and Industrial Device Numbering System) of the MC68HC908QYA/QTA Family Data Sheet, Rev. 3. No TSSOP, PDIP, or QFP variants exist for this specific orderable part number; the "DTE" suffix denotes the SOIC-28 industrial-temperature-grade variant.

Can the MC908QY2AMDTE operate from a single 3.3 V supply?

Yes, the MC908QY2AMDTE is fully specified for operation from 2.7 V to 5.5 V, making it compatible with standard 3.3 V logic systems. All peripherals - including the 10-bit ADC, COP watchdog, and KBI module - function correctly across this range, with LVI thresholds configurable to match the supply rail. Electrical characteristics at 3.3 V are detailed in Table 16-2 of the MC68HC908QYA/QTA Family Data Sheet, Rev. 3.